A prototype of the 2015 Mercedes-Benz CLS facelift has been spied undergoing testing hiding minor revisions.

A prototype of the 2015 Mercedes-Benz CLS facelift has been spied undergoing testing hiding minor revisions.

The stylish four-door coupe is preparing for a light revision for the 2015 model year which will bring a redesigned front bumper and some tweaks to the taillights. Previous spy photos have shown the rear bumper will also undergo minor surgery but maybe that change is only reserved to the AMG variant.

Based on some spy shots we posted last month, the cabin will adopt a redesigned steering wheel as well as a larger COMAND display and knob. Engines will most likely be carried over from the current model, including the range-topping CLS 63 AMG S-Model with its V8 5.5-liter twin-turbo outputting 585 HP (430 kW) and 590 lb-ft (800 Nm) of torque.

The modestly revised CLS lineup will be introduced towards the end of this year.